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Old 07-31-2010, 10:57 PM   #1
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Vent Stack Flashing


I have a cast iron vent stack that exits the first floor roof (over a bathroom addition) and is anchored to the side of my house where it extends past the second floor roof. The pipe itself is ~15 tall. The roofing cement around the base is a mess and I need to re-flash the vent before I get a leak.

How can I flash this? I can't use traditional vent flashing because I can't slide the flange down the length of the pipe (it's attached to the side of my house).

Is there a product that can wrap around the base without leaking or should I just re-patch the base with roofing cement?

Any advice would be greatly appreciated!

- Mike


Last edited by thompy31; 07-31-2010 at 11:02 PM.
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Old 08-01-2010, 02:59 AM   #2
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Vent Stack Flashing


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Originally Posted by thompy31 View Post
I have a cast iron vent stack that exits the first floor roof (over a bathroom addition) and is anchored to the side of my house where it extends past the second floor roof. The pipe itself is ~15 tall. The roofing cement around the base is a mess and I need to re-flash the vent before I get a leak.

How can I flash this? I can't use traditional vent flashing because I can't slide the flange down the length of the pipe (it's attached to the side of my house).

Is there a product that can wrap around the base without leaking or should I just re-patch the base with roofing cement?

Any advice would be greatly appreciated!

- Mike
Do a search for "electrical weatherhead flashing". There's a 2 piece flashing available that may work if there's enough space between the pipe and the wall.

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Old 08-01-2010, 09:17 PM   #3
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Vent Stack Flashing


Thanks so much! A search for electrical weatherhead flashing led me to a company that sells retrofit flashing that should work perfectly. $15 for the flashing an an hour's work should do the trick!

Thanks again!
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